Thanks for all the replies. I now feel a 'little' bit smarter about manual transmissions. I can also provide more info based on the dealer diag invoice. Based on noise at shutdown from the bell housing area they suspect the dual mass flywheel has broken springs. The quote was for parts and labor on flywheel and complete clutch assembly including hydraulics. Since it's still drivable, I'll probably look for a good transmission shop at my winter stop and discuss aftermarket parts. Drives between here and there are not mountainous.